Circuit arrangement for multiplex communication



May 3, 1921.

A. MEISSNER CIRCUIT ARRANGEMENT FDR MULTIPLEX COMMUNICATION Filed Feb.24, 1923 CHOKE COlLS .2 SATURATED ';;;g "M HARMONIC :1 9m muomc awvewcozALEXANDER MESSNER as; his throw; a/

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Patented May 3, 1927.

UNITED STATES PATENT OFFICE.

ALEXANDER MEISSNER, OF BERLIN, GERMANY. ASSIGNQR '10 GIGSELLSCHAFT FT TRDRAHTLOSE TELEGRAPHIE B. 11., 03: BERLIN, GERMANY, A CORPORATION OFGERMANY.

CIRCUIT ARRANGEMENT FOR.

Application filed February 24, 1323, Serial Arrangements are known 't'ornulltiplex tclc fihony and telegraphy in which saturated iron corechoke" coils and a single generator are used in which the windin g: ofthe generator divided in accordance with the mun-- ber of the sendingstages. or the. saturated choke coils of the individual stages areconnected in parallel with each other.

In accordance with the present invention. the choke coils are allcouncctm'l in series. In this way the circuit arraiurciueut isnuiterially sii'upliiied because the same current is used forsaturatii'igr a l oi them. The greatest. ad "antage resulting troiu thisarrangement is that harmonics produced by anyone choke coil cannot reachthe other sending circuits without passing; through all the other coilsand the generator. This eliminates many disturbances that arise in theuse of parallel connections. wherein the harmonics generated by any onecoil and its associated radio frequency circuit are di rectly applied toall the other sending circuits.

The single figure of the drawing is a diagrammatic representation of acircuit arrangement embodying the invention.

The illustrated circuit arrangement con prises a plurality of sendingcircuits 1L l3 and C, each including a saturated iron core choke coil D.The choke coils D may be magnetized in any usual or suitable manner andare connected in series with an alternating current generator G. Asshown. the sending circuits A, B and C are tuned respectively to wavelengths A A corrcsponding respectively to the fifth. seventh and. ninthharmonics of the basic frequency of the generator. Any desiredtransmitting means as antenna circuits E, F. and G may be coupled to thesending circuits A, B and C.

Having claim is:

1. A circuit arrangement for multiplex coml'nunication comprising. aplurality Oil sending systems, each including a. saturated iron corechoke coil, the choke coils being described my invention, what IMULTIPLEX COMMUNICATION No. 520,899. and in Germany March 23, 1922.

connected in series withcach other. and an alternating' currentgenerator connected. in series with said choke coils.

2. A circuit arrangement tlior multiplex coinruunication comprising. analternating current generator. a plurality of iron core choke coilsconnected in series with each other and with the generator, and sendingcircuits connected SOlOCiTiYQly with the choke coils and tuned todiiiereut harmonics of the basic Frequency of the generator.

I). In combination. a plurality of frequency changers. a source ofaltornating energy" said lrequeucy changes and said source being coupledall in series with each other and a plurality ot individual. workcircuits coupled to said frequency clningers.

t. In combination. a plurality of static frequency chanc't a source ofalternating energy, said static frequency changers and said source beingcoupled all in series with each other and a. plurality ot individualwork circuits coupled to said static frequency changers.

In combination, a plurality of frequency changers, a source ofalternating; energy. said frequency changers and said source beingcoupled all in series with each other and a plurality of individual workcircuits tuned to different frequencies coupled to said frequencychangers.

6. A circuit arrangement for multiplex communication. comprising asource of alternating currenh a plurality of iron core static frequencychangers coupled together in series with each other and with saidsource. and sending circuits coupled to said static "frequency changersand tuned to dif terent frequencies.

7. A circuit arrangement for multiplex communication, comprising: asource of alternating current, a plurality of iron core frequencychangers coupled together in series with each other, and with saidsource, and sending circuits coupled to said frequency changers andtuned to diiierent fre quencies.

ALEXANDER MEISSNER.

